The people into open relationship say that:
-they are more honest and successful than the people into closed ones,
-that people into closed ones are jealous of them,
-that people into closed ones are being said since they were child that open relationships are bad.
-that people into closed ones are not free minded*

Open relationships doesn't impeach:
-lies
-cross the rules

Moreover, people involved are not fully free, they are still held down by rules and the one you're in couple with.

Free minded here means that you have to follow all the ideas that free minded groups have. Closed minded means that you follow all ideas "regular" groups have.
By following, a group of idea, which group can say that they are more free than the other group?

People in "regular" relationships just think that you are in useless stuff.

Being single is the real status that you makes you really free.

A is in an open relationship with his girlfriend.

A flirts with every girl he meets and sometimes have sex whereas the rule is to not have sex.

Then he come back home and say that he just flirted with B, C, D. So, his girlfriend thank him for have not crossed any rule (whereas he did).

He actually loves to have this image of perfect prince fully dedicated with NO FLAWS and still act dirty undercover.

some gay ass status on facebook that girls put up with one of their friends to hide their real relationship status. this is frustrating, because you never know if they're single, or if they have a hookup and/or friend they don't want people to know about. usually its just so that they can play the field though

This is when two people who love eachother very much decide that they will continue to love eachother while having the experience of kissing other people. (This is sometimes used to test their true emotions / feelings for the other person.) This is most often used in college.

NO example is necessary, because this can be used differently depending on the situation.

an open relationship is a when two people like eachother, but you only call it a relationship when either partners legs are spread wide open like a pterodactyl's wings. otherwise theyre just regular-ass friends.

"yo bro i heard you and aaron were in an open relationship?"
"yeaah i mean we were last night!"
"whachu mean fool?"
"i mean me and aaron had relations when i tagged that ass wide open last night. hence open relatioship."